First I'll comment on 1) the problem with having too many Asians (or Indians or Arabs) around blacks: Asians are naturally racist against blacks. So when the number of Asians in an area, or an institution like a school, reaches critical mass (in this case around 80% Asians against 0.5% Blacks), power shifts to the Asians whose racism towards black peoppe--which is always present but normally inconsequential due to low Asian numbers--is both made overt and exacerbated.
Blqcks should try to restrict Asian, Indian and Arab immigration and consolidation whereever it appears around black people. These people are poison.
Now I'll comment on the story: the black parents should sue the school, attempt to pursue charges and move their children from the school.
Spot on.
They are not our friends.
As Black people, we have to learn how to close our ranks and push back against other groups.